.studio-hero {
    min-height: 330px;
    display: grid;
    grid-template-columns: 1.2fr .8fr;
    align-items: center;
    gap: 3rem;
    padding-block: 3.5rem;
    color: var(--cream);
    background: var(--ink);
    border-radius: 0 0 30px 30px;
}
.studio-hero h1 { max-width: 700px; margin-bottom: 1rem; }
.studio-hero .lead { max-width: 650px; color: rgba(255,255,255,.78); }
.studio-status { display: flex; align-items: flex-start; gap: .8rem; padding: 1.1rem; border: 1px solid rgba(255,255,255,.18); border-radius: 16px; background: rgba(255,255,255,.07); }
.status-dot { width: .75rem; height: .75rem; margin-top: .35rem; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 5px rgba(197,147,67,.16); }
.status-ready { background: #8fd19a; box-shadow: 0 0 0 5px rgba(143,209,154,.16); }
.studio-status strong, .studio-status span { display: block; }
.studio-status span { color: rgba(255,255,255,.65); font-size: .82rem; }
.studio-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: -2.2rem; position: relative; z-index: 2; }
.studio-stat-card { display: grid; gap: .15rem; padding: 1.25rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); box-shadow: var(--shadow); }
.studio-stat-card strong { font-family: Georgia, serif; font-size: 2.4rem; line-height: 1; }
.studio-stat-card > span:last-child { color: var(--muted); font-size: .82rem; }
.studio-section { padding-block: 2.5rem; }
.tool-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.tool-grid a { padding: 1.2rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.tool-grid strong, .tool-grid span { display: block; }
.tool-grid span { margin-top: .3rem; color: var(--muted); font-size: .88rem; }
.conversation-list { display: grid; gap: .5rem; }
.conversation-list a { display: grid; gap: .15rem; padding: .9rem 1rem; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
.conversation-list span { color: var(--muted); font-size: .8rem; }
.studio-page-heading { display: flex; align-items: end; justify-content: space-between; gap: 1.5rem; padding-block: 3rem 2rem; }
.studio-page-heading h1 { margin-bottom: .5rem; font-size: clamp(2.5rem, 6vw, 4.8rem); }
.studio-page-heading p { max-width: 700px; margin: 0; color: var(--muted); }
.back-link { display: inline-block; margin-bottom: .8rem; color: var(--gold); font-size: .82rem; font-weight: 800; }
.notice { padding: 1rem 1.2rem; border-left: 4px solid var(--gold); border-radius: 10px; color: var(--ink-soft); background: var(--gold-soft); }
.notice-warning { width: min(100% - 2.2rem, var(--max)); margin: -1rem auto 1.5rem; }
.workbench-grid { display: grid; grid-template-columns: minmax(16rem, .8fr) minmax(24rem, 1.3fr) minmax(16rem, .8fr); align-items: start; gap: 1rem; padding-bottom: 5rem; }
.workbench-panel { min-width: 0; padding: 1.2rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); box-shadow: 0 5px 18px rgba(24,51,47,.04); }
.panel-heading { display: flex; align-items: center; justify-content: space-between; gap: .75rem; margin-bottom: 1rem; }
.panel-heading h2 { margin: 0; font-size: 1.55rem; }
.panel-heading .eyebrow { margin: 0 .4rem 0 0; }
.panel-heading a { color: var(--gold); font-size: .78rem; font-weight: 800; }
.source-picker label, .composer label { display: block; margin-bottom: .4rem; font-size: .82rem; font-weight: 800; }
.source-picker select { margin-bottom: .6rem; }
.source-preview, .panel-empty, .generated-list { padding: 1rem; border-radius: 12px; background: var(--cream); }
.source-preview h3 { margin: .5rem 0; font-size: 1.3rem; }
.source-preview p, .panel-empty, .generated-list p { margin: 0; color: var(--muted); font-size: .86rem; }
.source-preview dl { margin: 1rem 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: .4rem; }
.source-preview dl div { padding: .5rem; border-radius: 8px; background: var(--paper); text-align: center; }
.source-preview dt { color: var(--muted); font-size: .65rem; text-transform: uppercase; }
.source-preview dd { margin: .1rem 0 0; font-weight: 800; }
.panel-links { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1rem; }
.panel-links a { color: var(--gold); font-size: .8rem; font-weight: 800; }
.message-list { max-height: 34rem; overflow: auto; display: flex; flex-direction: column; gap: .7rem; padding: .2rem .2rem .8rem; }
.message-bubble { max-width: 92%; padding: .8rem .95rem; border-radius: 14px; background: var(--cream); }
.message-bubble.message-user { align-self: end; color: var(--cream); background: var(--ink); }
.message-bubble.message-assistant { border: 1px solid var(--line); background: var(--paper); }
.message-bubble.message-system { align-self: center; color: var(--rose); border: 1px dashed var(--rose); background: #fff8f8; }
.message-meta { margin-bottom: .35rem; color: var(--muted); font-size: .68rem; }
.message-user .message-meta { color: rgba(255,255,255,.6); }
.message-body { overflow-wrap: anywhere; font-size: .9rem; white-space: pre-wrap; }
.message-sources { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .6rem; }
.message-sources span { color: inherit; opacity: .7; font-size: .68rem; }
.message-sources small { padding: .15rem .45rem; border-radius: 999px; color: #fff; background: var(--ink); font-size: .68rem; }
.composer { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.composer textarea { min-height: 7rem; }
.composer-actions { display: flex; align-items: center; justify-content: space-between; gap: .7rem; margin-top: .6rem; }
.composer-actions span, .muted { color: var(--muted); font-size: .72rem; }
.generated-actions { display: flex; align-items: center; gap: .7rem; margin-bottom: 1rem; }
.generated-list { margin-bottom: .8rem; }
.generated-list strong { display: block; margin-bottom: .25rem; }
.generated-list form { margin-top: .8rem; }

/* --- Chatbot workbench --- */
.chat-heading-actions { display: flex; align-items: center; gap: .4rem; }
.chat-heading-actions .button { padding: .35rem .6rem; font-size: .74rem; }
.chat-history { margin-bottom: 1rem; padding-bottom: .8rem; border-bottom: 1px solid var(--line); }
.chat-history-list { display: grid; gap: .4rem; max-height: 18rem; overflow: auto; }
.chat-history-item { display: flex; align-items: center; gap: .4rem; padding: .5rem .5rem .5rem .7rem; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); }
.chat-history-item.is-active { border-color: var(--gold); background: var(--gold-soft); }
.chat-history-link { display: grid; gap: .12rem; flex: 1; min-width: 0; }
.chat-history-link strong { font-size: .85rem; }
.chat-history-link span { color: var(--muted); font-size: .7rem; }
.chat-history-delete { flex: 0 0 auto; width: 1.8rem; height: 1.8rem; display: inline-flex; align-items: center; justify-content: center; border: 1px solid transparent; border-radius: 999px; color: var(--muted); background: transparent; font-size: .8rem; line-height: 1; }
.chat-history-delete:hover { color: #fff; background: #a33232; border-color: #a33232; }
.conversation-panel .message-list { max-height: 30rem; scroll-behavior: smooth; }
.chat-model-row { margin-bottom: .6rem; }
.chat-model-row label { display: block; margin-bottom: .3rem; font-size: .82rem; font-weight: 800; }
.chat-model-row select { width: 100%; padding: .4rem .6rem; border: 1px solid var(--line); border-radius: 10px; font-size: .85rem; }
.message-bubble.is-typing .message-body { color: var(--muted); font-style: italic; }
.message-bubble.is-typing .message-body::after { content: ' ▍'; animation: chat-blink 1s steps(2, start) infinite; }
.message-bubble.message-error { color: #8a2b2b; border: 1px dashed var(--rose); background: #fff8f8; }
@keyframes chat-blink { 50% { opacity: 0; } }